0.5 V Universal Filter and Quadrature Oscillator Based on Multiple-Input DDTA

Kumngern, Montree; Khateb, Fabian; Kulej, Tomasz

doi:10.1109/access.2023.3240520

Cited by 4 publications

(11 citation statements)

References 40 publications

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“…The proposed filter shows the most extensive frequency tuning range among all the compared works: three decades for [16] and four decades for [17]- [22]. However, this fivedecads frequency tuning range (0.1 Hz -10 kHz) comes with a power consumption constrain due to the programability of the HV-PMOS resistors; nano-watt power consumption is achieved when the filter works in frequencies bellow 10 Hz, while micro-watt consumption occurs for frequencies above 100 Hz.…”

Section: E Comparison With Other Workmentioning

confidence: 99%

“…Transconductance reduction can be achieved by one of the following three methods: current attenuation/cancellation [7] [8], voltage attenuation [9], and transconductance cascading [10]. Also, the implementation of Multiple-Input Bulk-Driven (MI-BD) [16], [19]- [22], and Multiple-Input Quasi Floating Gate (MI-QFG) [17]- [18] OTAs has been successfully explored.…”

Section: Introductionmentioning

confidence: 99%

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A Reconfigurable-Band Analog Filter Standard-Cell Based on Differential/Single Input Signaling

Diaz-Sanchez,

Zamora-Mejia,

Rocha-Perez

et al. 2024

IEEE Access

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This work presents a reconfigurable-band analog filter capable of performing the low-pass, high-pass, band-pass or all-pass functions. The proposed filter is a simple and compact cell composed of only two RC networks and one differential Operational Transconductance Amplifier (OTA). To select the desired filter type, two configurations must be done: 1) the two RC network shall be configured as lowpass/low-pass, high-pass/high-pass or low-pass/high-pass, 2) the input signals must be fed in differential or single mode. To validate theory and simulations, the proposed reconfigurable-band filter was designed, fabricated and measured to meet the biomedical band (0.1 Hz -10 kHz) in a 0.5 µm CMOS standard fabrication process. To achieve the extremely low RC time constants imposed by the biomedical band, the R element was implemented using PMOS high-value programmable resistor. The prototype exhibits a silicon area of 470 µm x 250 µm and a power consumption of 96.32 µW using a ± 0.8 V symmetric power supply. Due to this circuit's ability to perform four filter-functions, its operation band can be tuned over five decades, its power consumption is in the nano and micro-watt regime, and it is area compact, the proposed analog filter is a suitable candidate for being an analog standard-cell.INDEX TERMS CMOS, Continuous-time filter, Analog standar cell, Universal filter, Very-low frequency.

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Section: E Comparison With Other Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Reconfigurable-Band Analog Filter Standard-Cell Based on Differential/Single Input Signaling

Diaz-Sanchez,

Zamora-Mejia,

Rocha-Perez

et al. 2024

IEEE Access

View full text Add to dashboard Cite

show abstract

“…The open-loop voltage gain of the DDA can be expressed as:

where the coefficients m 1 and m 2 are the ratios of the absolute values of the negative and positive conductances in a lower and upper PPF circuit, respectively [ 62 ]:

…”

Section: Proposed Ddta Circuit With Multiple-input and Multiple-outputmentioning

confidence: 99%

“…Filters for such applications are in high demand, especially for biosignal and sensor signal processing. Many filters based on multiple-input DDTA have been presented [61][62][63][64][65][66][67][68]. This paper presents a versatile mixed-mode filter using MIMO-DDTAs.…”

Section: Introductionmentioning

confidence: 99%

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0.5-V 281-nW Versatile Mixed-Mode Filter Using Multiple-Input/Output Differential Difference Transconductance Amplifiers

Khateb,

Kumngern,

Kulej

2023

Sensors

Self Cite

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This paper presents a new low-voltage versatile mixed-mode filter which uses a multiple-input/output differential difference transconductance amplifier (MIMO-DDTA). The multiple-input of the DDTA is realized using a multiple-input bulk-driven MOS transistor (MI-BD-MOST) technique to maintain a single differential pair, thereby achieving simple structure with minimal power consumption. In a single topology, the proposed filter can provide five standard filtering functions (low-pass, high-pass, band-pass, band-stop, and all-pass) in four modes: voltage (VM), current (CM), transadmittance (TAM), and transimpedance (TIM). This provides the full capability of a mixed-mode filter (i.e., twenty filter functions). Moreover, the VM filter offers high-input and low-output impedances and the CM filter offers high-output impedance; therefore, no buffer circuit is needed. The natural frequency of all filtering functions can be electronically controlled by a setting current. The voltage supply is 0.5 V and for a 4 nA setting current, the power consumption of the filter was 281 nW. The filter is suitable for low-frequency biomedical and sensor applications that require extremely low supply voltages and nano-watt power consumption. For the VM low-pass filter, the dynamic range was 58.23 dB @ 1% total harmonic distortion. The proposed filter was designed and simulated in the Cadence Virtuoso System Design Platform using the 0.18 µm TSMC CMOS technology.

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0.5-V 281-nW Versatile Mixed-Mode Filter Using Multiple-InPut/Output Differential Difference Transconductance Amplifiers

Khateb,

Kumngern,

Kulej

2023

Preprint

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This paper presents a new low-voltage versatile mixed-mode filter which uses a multi-ple-input/output differential difference transconductance amplifier (MIMO-DDTA). The multi-ple-input of the DDTA is realized using a multiple-input bulk-driven MOS transistor (MI-BD-MOST) technique to maintain a single differential pair, thereby achieving simple structure with minimal power consumption. In a single topology, the proposed filter can provide five standard filtering functions (low-pass, high-pass, band-pass, band-stop, and all-pass) in four modes: voltage (VM), current (CM), transadmittance (TAM), and transimpedance (TIM). This provides the full capability of a mixed mode filter (i.e., twenty filter functions). Moreover, the VM filter offers high-input and low-output impedances and the CM filter offers high-output impedance; therefore, no buffer circuit is needed. The natural frequency of all filtering functions can be electronically controlled by a setting current. The voltage supply is 0.5 V and for a 4 nA setting current, the power consumption of the filter was 281 nW. The filter is suitable for low-frequency biomedical and sensor applications that require extremely low supply voltages and nano-watt power consumption. For the VM low-pass filter, the dynamic range was 58.23 dB @ 1 % total harmonic distortion. The proposed filter was designed and simulated in the Cadence Virtuoso System Design Platform using the 0.18 µm TSMC CMOS technology.

show abstract

0.5 V Universal Filter and Quadrature Oscillator Based on Multiple-Input DDTA

Cited by 4 publications

References 40 publications

A Reconfigurable-Band Analog Filter Standard-Cell Based on Differential/Single Input Signaling

A Reconfigurable-Band Analog Filter Standard-Cell Based on Differential/Single Input Signaling

0.5-V 281-nW Versatile Mixed-Mode Filter Using Multiple-Input/Output Differential Difference Transconductance Amplifiers

0.5-V 281-nW Versatile Mixed-Mode Filter Using Multiple-InPut/Output Differential Difference Transconductance Amplifiers

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